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p = 5 cm = 5x10⁻² m
l = 4 cm = 4x10⁻² m
t = 3 cm = 3x10⁻² m
ρ = 7.900 kg/m³
Ditanyakn : m ?
dijawab :
V = p x l x t
= 5x10⁻² x 4x10⁻² x 3x10⁻²
= 60x10⁻⁶ m³
= 6x10⁻⁵ m³
jadi massa :
m =ρ x V
= 7.900 x 6x10⁻⁵
= 47.400x10⁻⁵
= 474x10⁻³ kg
= 0,474 kg